| Tower Hamlets St George (1885 - 1918) |
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| Tower Hamlets Whitechapel (1885 - 1918) |
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| Tunbridge (1885 - 1918) |
Full name (in Craig 2) Kent, Tunbridge |
| Tynemouth (1885) |
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| Tyneside (1885 - 1918) |
Full name (in Craig 2) Northumberland, Tynside |
| Tyrone East (1885 - 1918) |
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| Tyrone Mid (1885 - 1918) |
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| Tyrone North (1885 - 1918) |
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| Tyrone South (1885 - 1922) |
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| Uxbridge (1885 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). Full name (in Craig 2,3,4) Middlesex, Uxbridge. Constituency of same name reformed 1983. |
| Walthamstow (1885 - 1918) |
Full name (in Craig 2) Essex, Walthamstow. Constituency of same name reformed 1983. |
| Wandsworth (1885 - 1918) |
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| Wansbeck (1885 - 1950) |
Full name (in Craig 2,3) Northumberland, Wansbeck. Constituency of same name reformed in 1983. |
| Warwick and Leamington (1885) |
Full name (in Craig 3,4) Warwickshire, Warwick and Leamington |
| Waterford East (1885 - 1918) |
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| Waterford West (1885 - 1918) |
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| Watford (1885) |
Full name (in Craig 2,3) Herefordshire, Watford |
| Wellington [Shropshire] (1885 - 1918) |
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| Wellington [Somerset] (1885 - 1918) |
Full name (in Craig 2) Somerset, Wellington |
| West Bromwich (1885 - 1974) |
Constituency first used at the February General election of 1974 (28/02/1974). |
| West Ham North (1885 - 1918) |
Constituency of same name also existed 1950-1974¹. |
| West Ham South (1885 - 1918) |
Constituency of same name also existed 1950-1974¹ |
| Westhoughton (1885 - 1983) |
Full name (in Craig 2,3,4) Lancashire, Westhoughton |
| Westmeath North (1885 - 1918) |
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| Westmeath South (1885 - 1918) |
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